APA (7th ed.) Citation

Swindoll, C. R. (1981). Commitment: The key to marriage. Multnomah Press.

Chicago Style (17th ed.) Citation

Swindoll, Charles R. Commitment: The Key to Marriage. Portland, Oregon: Multnomah Press, 1981.

MLA (9th ed.) Citation

Swindoll, Charles R. Commitment: The Key to Marriage. Multnomah Press, 1981.